EP0934533B1 - Schaltungsanordnung zur leckstromüberwachung - Google Patents

Schaltungsanordnung zur leckstromüberwachung Download PDF

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Publication number
EP0934533B1
EP0934533B1 EP97911225A EP97911225A EP0934533B1 EP 0934533 B1 EP0934533 B1 EP 0934533B1 EP 97911225 A EP97911225 A EP 97911225A EP 97911225 A EP97911225 A EP 97911225A EP 0934533 B1 EP0934533 B1 EP 0934533B1
Authority
EP
European Patent Office
Prior art keywords
potential
source
supply line
leakage current
test
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP97911225A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0934533A1 (de
Inventor
Michael Zydek
Wolfgang Fey
Micha Heinz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Teves AG and Co OHG
Original Assignee
Continental Teves AG and Co OHG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Teves AG and Co OHG filed Critical Continental Teves AG and Co OHG
Publication of EP0934533A1 publication Critical patent/EP0934533A1/de
Application granted granted Critical
Publication of EP0934533B1 publication Critical patent/EP0934533B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/72—Testing of electric windings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/005—Testing of electric installations on transport means
    • G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks

Definitions

  • the invention relates to a circuit arrangement for Leakage current monitoring of a circuit that has a variety from connected in parallel to a supply line, via individual switches to the second pole of a supply voltage source or coils that can be connected to ground or others contains inductive loads and where the supply line via a main switch to the supply voltage source or to the first pole of the supply voltage source as well as for leakage current check to an auxiliary source or Test signal source can be connected, one for leakage current detection evaluable potential change on the Supply line. It is particularly on a circuit for driving the valve coils one regulated braking system.
  • DE 42 42 177 A1 (P 7433) is a circuit arrangement of this type known for monitoring valve coils a controlled brake system and the associated control stages serves.
  • the valve coils are on the one hand common main switch or a (semiconductor) relay the positive pole of the vehicle battery and on the other hand one output stage or one individual switch to ground switched.
  • An auxiliary voltage source is used for leakage current detection over a high resistance to that of the Main switch to the common supply line leading to the valve coils connected. It will have the potential this supply line measured with the main switch open and evaluated. In the event of a shunt or leakage current from the supply line to the supply source or to The potential on the supply line changes towards ground. Via a voltage divider and a potential monitor are potential shifts caused by leakage currents are recognized and signaled.
  • the present invention is based on the object to develop a circuit arrangement of the type mentioned at the outset, with which leakage currents are particularly reliable or shunts of different types can be. With a simple structure and easy evaluation the test results are also important.
  • the special feature is that as an auxiliary or test signal source a power source is provided in front of each Close the main switch when the individual switches are still open switched on to the supply voltage source and thereby is activated, whereupon the setting Voltage potential determined on the supply line and is evaluated for leakage current detection.
  • Test phase namely after activating the test current source the potential on the supply line almost to the full value of the supply voltage or battery voltage raised.
  • Test phase namely after activating the test current source the potential on the supply line almost to the full value of the supply voltage or battery voltage raised.
  • known circuits with lower Auxiliary voltage and / or high resistance in the test path through the potential increase to the battery potential level also shunts detected only in relative high voltage level occur or be triggered.
  • Due to defects and defects in the crystal lattice structure Semiconductors can lead to shunts that become effective from a certain voltage potential. Man can compare this behavior with the Zener effect, at that only above a certain voltage value, namely the Zener voltage, a current flow occurs.
  • the invention is in the test phase, i.e. after activating the test current source, using a comparator the difference between the potential on the supply line and the potential the supply voltage source determined.
  • a valve coil circuit is shown, the essentially of several or a plurality of parallel switched valve coils L1 to Ln, which have individual switches or driver stages T1 to Tn on and off and consists of a main switch or Main Driver MD.
  • the power supply is the same as in a motor vehicle usual, via the vehicle terminal KL30, which is in the present Example of the positive pole of the vehicle battery with the voltage UB leads and over the symbolically represented ground connection.
  • the Main Driver MD is therefore also called a high-side driver, the individual switches or transistors T1 to Tn are referred to as low-side drivers.
  • valve circuit The basic components of this valve circuit include also the control of the main switch MD by a Logic circuit or logic 1.
  • a Logic circuit or logic 1 When creating a Input signal IN is via the logic circuit 1 and one Switch 2 a gate signal or control signal OUT1 for switching on the main switch or closing the MD.
  • VCP is the control voltage required for the Main Driver MD, that with such a circuit above the battery voltage UB must lie.
  • the circuit shown is Type used to control the valve coils of a regulated Brake system is used when the control is used until completion a controlled braking process of the main switch MD closed. Via the individual switch or low-side driver T1 to Tn is then by applying variable pulse trains Brake pressure control causes. The pulse duration, pulse sequences, pulse pause ratios etc. are thereby from the (not shown) Control logic of the brake system is calculated and specified.
  • each time the main driver is switched on MD or closing the main switch a leakage current check carried out. If the presence of leakage currents, exceed the permissible minimum values, determined, prevented the leakage current monitoring the switching on and that Close the main switch MD.
  • the current source 3 is a current source 3 for leakage current monitoring provided to carry out the test via a Switch 4, which operates the logic 1, by connecting to the Supply voltage or battery voltage is activated.
  • the supply voltage is applied to the KL30 terminal. While this test procedure are the main switch MD and the individual switches T1 to Tn open.
  • the current source 3 is e.g. For designed for an impressed current of 30 mA. If no shunt exists or the shunt or leakage current one does not exceed the specified limit is indicated by the power source the potential on the supply line REF down to (almost) the potential of the supply voltage or Battery voltage UB (terminal 30) raised.
  • Comparator 5 With help of a Comparator 5 now only needs the difference between the potential on the supply line REF and the potential to be determined at terminal KL30; lies the difference below a predetermined limit in the range of e.g. 1 to 2 volts, this indicates an intact circuit there.
  • the comparator 5 therefore signals the logic 1 the check result (OUT2). Will no shunt or leakage current found, the switch 4 is opened again and thereby inactivating the power source 3. Via switch 2 the main driver or high-side driver MD is controlled.
  • Fig. 1 Dotted in Fig. 1 are some that occur in practice Shunt variants indicated.
  • the line leading to the crowd Concentration near L1 represents a short circuit to ground and to an auxiliary voltage source VCC5 - such Auxiliary voltage sources are used in circuits of the here standing type common - call leakage currents different Height.
  • the test current source 3 impressed current flow and it thus prevent the potential on the supply line REF is raised above a certain value.
  • the specified threshold value e.g. 1.2 V
  • the anti-parallel circuit 6 shown two more Power sources and the left of a dash-dotted line shown voltage divider R3, R4 with an associated Voltage monitor 7 are not essential Components of the monitoring circuit according to the invention. These components were only inserted in Fig. 1 to show that for other reasons existing circuit parts, Monitoring circuits etc. can be connected, without the function of leakage current monitoring according to the invention to hinder. Through these additional components only the permissible tributary flow or leakage current, the when dimensioning the test current source 3 and the threshold values of the comparator 5 must be specified.
  • the potential increase on the supply line REF does not take place immediately, but only after a certain period of time, which depends on the inductance of the valve coil L1 to Ln concerned. Until the evaluation of the potential change after the activation of the test current source 3, a certain delay or waiting time t test is therefore specified. Only after this waiting time or delay time has elapsed is it determined whether the potential increase is sufficient or whether the potential difference at the inputs of the comparator 5 is below the predetermined threshold value.
  • the length of time or waiting time t Test which must elapse before a leakage current or shunt can be reliably detected, depends on the inductance of the coils, the series resistances of the coils and the current source and, if appropriate, on the threshold voltage or the Zener voltage.
  • the switch 4 is therefore opened and the main switch or main driver MD is closed by the signal OUT1, because the potential on the supply line REF had almost assumed the value of the potential at the terminal KL30 ; the potential difference at the inputs of the comparator 5 was below a predetermined threshold.
  • the main switch MD After switching off or opening the main switch MD at the time t 2 , the main switch MD must be closed again at the time t 3 ; this is shown in the curve IN (IN is the input signal of logic 1).
  • the test current source 3 is activated at the time t 3 .
  • the reference potential REF is raised only slightly in the time period t test .
  • the comparator 5 registers an excessively large potential difference between the potential at the terminal KL30 and the supply line REF, which lies above the predetermined threshold value. Leakage current detection is therefore present at time t 4 , which is why the logic 1 (FIG. 1) prevents the main switch MD from closing.
  • the circuit arrangement according to the invention thus enables this Detection of leakage currents from different causes somewhere in the circuit below the main switch MD caused as long as the leakage current or Sidestream is greater than one by the default of the impressed Current of the test current source specified minimum current and sets in below a tension created by the Threshold voltage of the comparator used for error detection 5 is specified.
  • "leaks" of the Low-side valve drivers T1 to Tn recognized by "pinholes" are evoked and appear as zener effects with Make voltages greater than 5 volts noticeable.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
  • Measurement Of Current Or Voltage (AREA)
EP97911225A 1996-10-24 1997-10-15 Schaltungsanordnung zur leckstromüberwachung Expired - Lifetime EP0934533B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19644181A DE19644181A1 (de) 1996-10-24 1996-10-24 Schaltungsanordnung zur Leckstromüberwachung
DE19644181 1996-10-24
PCT/EP1997/005684 WO1998018014A1 (de) 1996-10-24 1997-10-15 Schaltungsanordnung zur leckstromüberwachung

Publications (2)

Publication Number Publication Date
EP0934533A1 EP0934533A1 (de) 1999-08-11
EP0934533B1 true EP0934533B1 (de) 2000-08-09

Family

ID=7809849

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97911225A Expired - Lifetime EP0934533B1 (de) 1996-10-24 1997-10-15 Schaltungsanordnung zur leckstromüberwachung

Country Status (5)

Country Link
US (1) US6201479B1 (ja)
EP (1) EP0934533B1 (ja)
JP (1) JP3866294B2 (ja)
DE (2) DE19644181A1 (ja)
WO (1) WO1998018014A1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012214774A1 (de) 2012-08-20 2014-02-20 Continental Teves Ag & Co. Ohg Elektronische Schaltungsanordnung in einem Kraftfahrzeugsteuergerät

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6761710B2 (en) 1999-12-03 2004-07-13 The Procter & Gamble Company Container for the collection of menstrual flow
DE10224058A1 (de) * 2001-08-11 2003-05-15 Continental Teves Ag & Co Ohg Verfahren zur Prüfung eines Stromreglers eines elektronisch ansteuerbaren Ventils einer hydraulischen Fahrzeugbremsanlage
US6750660B2 (en) * 2001-09-12 2004-06-15 Alstom Technology Ltd Apparatus for evaluating data representing the electrical characteristics of a combustion vessel
DE10150752B4 (de) * 2001-10-13 2012-03-01 Conti Temic Microelectronic Gmbh Ventiltreiber
JP4082676B2 (ja) * 2003-05-29 2008-04-30 株式会社デンソー 漏電検出装置の検査システム
US7162652B2 (en) * 2003-06-20 2007-01-09 Texas Instruments Incorporated Integrated circuit dynamic parameter management in response to dynamic energy evaluation
DE102010030826A1 (de) 2010-07-01 2012-01-05 Robert Bosch Gmbh Verfahren und Schaltungsanordnung zur Diagnose eines Lastpfades in einem Fahrzeug
JP2013185890A (ja) * 2012-03-07 2013-09-19 Denso Corp リーク電流検出装置
US9442149B2 (en) 2013-07-08 2016-09-13 Stmicroelectronics S.R.L. Measuring leakage currents and measuring circuit for carrying out such measuring
US10134550B2 (en) * 2015-05-21 2018-11-20 Asco Power Technologies, L.P. Short circuit detection circuit
CN107290615B (zh) * 2016-03-31 2019-07-26 比亚迪股份有限公司 一种电动汽车负载的漏电检测方法
DE102016007900A1 (de) 2016-06-28 2017-12-28 Audi Ag Mehrspannungs-Steuervorrichtung für ein Kraftfahrzeug, Kraftfahrzeug und Betriebsverfahren für die Steuervorrichtung
CN113376545A (zh) * 2020-11-13 2021-09-10 国网江西省电力有限公司柘林水电厂 一种水电站漏电流相对异常信号的检测方法

Family Cites Families (9)

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Publication number Priority date Publication date Assignee Title
JPS55147331A (en) * 1979-05-07 1980-11-17 Toyota Central Res & Dev Lab Inc Engine analyzer
DE3925418C2 (de) 1989-08-01 1997-02-27 Teves Gmbh Alfred Schaltungsanordnung zur Überwachung der Endstufen einer Vielzahl von Ventilen
FR2651890B1 (fr) * 1989-09-11 1991-12-13 Siemens Bendix Automotive Elec Dispositif de detection et de discrimination de defauts de fonctionnement d'un circuit d'alimentation electrique.
US5245495A (en) * 1990-09-18 1993-09-14 General Electric Company Automatic flashover protection for locomotive traction motors
US5159516A (en) 1991-03-14 1992-10-27 Fuji Electric Co., Ltd. Overcurrent-detection circuit
DE4242177A1 (de) * 1992-12-15 1994-06-16 Teves Gmbh Alfred Schaltungsanordnung zur Überwachung einer Vielzahl von Spulen
DE4338462B4 (de) * 1993-11-11 2004-04-22 Hella Kg Hueck & Co. Kontrollsystem für elektrische Verbraucher in Kraftfahrzeugen
US5528445A (en) * 1994-09-23 1996-06-18 General Electric Company Automatic fault current protection for a locomotive propulsion system
DE19526435B4 (de) * 1995-06-01 2004-07-22 Continental Teves Ag & Co. Ohg Schaltungsanordnung zur Fehlerstromerkennung

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012214774A1 (de) 2012-08-20 2014-02-20 Continental Teves Ag & Co. Ohg Elektronische Schaltungsanordnung in einem Kraftfahrzeugsteuergerät

Also Published As

Publication number Publication date
DE59702161D1 (de) 2000-09-14
EP0934533A1 (de) 1999-08-11
DE19644181A1 (de) 1998-04-30
JP3866294B2 (ja) 2007-01-10
US6201479B1 (en) 2001-03-13
WO1998018014A1 (de) 1998-04-30
JP2001506748A (ja) 2001-05-22

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